In normally, when RyuBGPSpeaker originates some prefixes, it sends BGP Update
messages as [ASpath: None] to peering iBGP router.
But, In use of ASPathFilter 'policy=TOP', RyuBGPSpeaker has failed to send
Update messages as bellow.
$ sudo python sampleBGP_for_InterAS-MPLS-VPN-in-RyuBGP1.py
INFO:bgpspeaker.api.base:API method core.start called with args: {'router_id':
'10.0.1.1', 'label_range': (1000, 1999), 'waiter': <ryu.lib.hub.Event object at
0x7f6ba91de890>, 'local_as': 65011, 'bgp_server_port': 179,
'refresh_max_eor_time': 0, 'refresh_stalepath_time': 0}
INFO:bgpspeaker.api.base:API method neighbor.create called with args:
{'remote_as': 65010, 'cap_mbgp_vpnv6': False, 'cap_mbgp_vpnv4': True,
'cap_mbgp_ipv6': False, 'is_next_hop_self': False, 'cap_mbgp_ipv4': True,
'multi_exit_disc': 100, 'is_route_server_client': False, 'peer_next_hop': None,
'password': None, 'ip_address': '192.168.101.101'}
INFO:bgpspeaker.api.base:API method neighbor.create called with args:
{'remote_as': 65011, 'local_port': 50001, 'cap_mbgp_vpnv6': False,
'cap_mbgp_vpnv4': True, 'cap_mbgp_ipv6': False, 'is_next_hop_self': True,
'cap_mbgp_ipv4': True, 'is_route_server_client': False, 'peer_next_hop': None,
'local_address': '10.0.1.1', 'password': None, 'ip_address': '10.0.1.2'}
INFO:bgpspeaker.api.base:API method neighbor.create called with args:
{'remote_as': 65011, 'local_port': 50002, 'cap_mbgp_vpnv6': False,
'cap_mbgp_vpnv4': True, 'cap_mbgp_ipv6': False, 'is_next_hop_self': True,
'cap_mbgp_ipv4': True, 'is_route_server_client': False, 'peer_next_hop': None,
'local_address': '10.0.1.1', 'password': None, 'ip_address': '10.0.1.3'}
INFO:bgpspeaker.api.base:API method vrf.create called with args: {'import_rts':
['65010:101'], 'route_family': 'ipv4', 'site_of_origins': None, 'route_dist':
'65010:101', 'export_rts': ['65010:101']}
INFO:bgpspeaker.api.base:API method prefix.add_local called with args:
{'prefix': '192.168.4.0/30', 'next_hop': '0.0.0.0', 'route_dist': '65010:101',
'route_family': 'ipv4'}
INFO:bgpspeaker.api.base:API method prefix.add_local called with args:
{'prefix': '10.10.10.4/32', 'next_hop': '192.168.4.2', 'route_dist':
'65010:101', 'route_family': 'ipv4'}
INFO:bgpspeaker.api.base:API method prefix.add_local called with args:
{'prefix': '192.168.204.0/30', 'next_hop': '192.168.4.2', 'route_dist':
'65010:101', 'route_family': 'ipv4'}
INFO:bgpspeaker.api.base:API method neighbor.attribute_map.set called with
args: {'ip_address': '10.0.1.3', 'route_family': 'ipv4', 'route_dist':
'65010:101', 'attribute_map':
[AttributeMap(filters=[ASPathFilter(as_number=65010,policy=TOP)],attribute_type=LOCAL_PREF,attribute_value=200)]}
INFO:bgpspeaker.cli:starting ssh server at localhost:4990
INFO:bgpspeaker.peer:Connection to peer: 192.168.101.101 established
INFO:bgpspeaker.peer:Connection to peer: 10.0.1.2 established
INFO:bgpspeaker.peer:Connection to peer: 10.0.1.3 established
ERROR:ryu.lib.hub:hub: uncaught exception: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/ryu/lib/hub.py", line 52, in
_launch
func(*args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/peer.py",
line 708, in _process_outgoing_msg_list
self._send_outgoing_route(outgoing_msg)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/peer.py",
line 667, in _send_outgoing_route
update_msg = self._construct_update(outgoing_route)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/peer.py",
line 938, in _construct_update
result = self._lookup_attribute_map(at_maps, attr_type, path)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/peer.py",
line 2004, in _lookup_attribute_map
cause, result = m.evaluate(path)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/info_base/base.py",
line 1171, in evaluate
cause, result = f.evaluate(path)
File
"/usr/local/lib/python2.7/dist-packages/ryu/services/protocols/bgp/info_base/base.py",
line 1074, in evaluate
path_seg = path_seg_list[0]
IndexError: list index out of range
Signed-off-by: Toshiki Tsuboi <[email protected]>
---
ryu/services/protocols/bgp/info_base/base.py | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/ryu/services/protocols/bgp/info_base/base.py
b/ryu/services/protocols/bgp/info_base/base.py
index 0e56bd0..d3bc445 100644
--- a/ryu/services/protocols/bgp/info_base/base.py
+++ b/ryu/services/protocols/bgp/info_base/base.py
@@ -1000,9 +1000,9 @@ class ASPathFilter(Filter):
Attribute Description
================ ==================================================
as_number A AS number used for this filter
- policy ASPathFilter.POLICY_TOP and PrefixFilter.POLICY_END,
+ policy ASPathFilter.POLICY_TOP and ASPathFilter.POLICY_END,
ASPathFilter.POLICY_INCLUDE and
- PrefixFilter.POLICY_NOT_INCLUDE are available.
+ ASPathFilter.POLICY_NOT_INCLUDE are available.
================ ==================================================
Meaning of each policy is as follows;
@@ -1011,7 +1011,7 @@ class ASPathFilter(Filter):
Filter checks if the specified AS number is at the top of
AS_PATH attribute.
- * POLICY_TOP :
+ * POLICY_END :
Filter checks is the specified AS number
is at the last of AS_PATH attribute.
@@ -1071,7 +1071,10 @@ class ASPathFilter(Filter):
path_aspath = path.pathattr_map.get(BGP_ATTR_TYPE_AS_PATH)
path_seg_list = path_aspath.path_seg_list
- path_seg = path_seg_list[0]
+ if path_seg_list:
+ path_seg = path_seg_list[0]
+ else:
+ path_seg = []
result = False
LOG.debug("path_seg : %s", path_seg)
--
1.9.1
------------------------------------------------------------------------------
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